her son back, korbey felt holden was ready to start kindergarten just after he turned five. >> holly korbey safer: now age eight and in the third grade, holden korbey seems to be thriving, despite being the youngest in his class. >> holly korbey: he gets excellent grades. he has never had a behavioral issue. he has lots of friends. he's absolutely normal. >> safer: having been through this experience, how would you advise young parents? >> holly korbey: okay, i have one message-- have your babies in the wintertime. if you are thinking about becoming a parent, have your babies in the wintertime, and then you will get to avoid this issue completely. >> go to 60minutesovertime.com to hear the story behind our red-shirting piece from morley safer and his producers. sponsored by pfizer. i'm phil mickelson, pro golfer. if you have painful, swollen joints, i've been in your shoes. one day i'm on top of the world... the next i'm saying... i have this thing called psoriatic arthritis. i had some intense pain. it progressively got worse. my rheumatologist told me about enbrel. i'm surprised how quick